wget sourceforge 最新7zip批处理

Question

我想使用 wget 获取最新版本的 64 位和 32 位 7zip。但是，如果我使用 wget，它不会从文件夹中下载 exe 文件，而只会下载名为“7z1507-extra.7z”的文件。我怎样才能只得到 .EXE 文件？

我调用的命令：

wget "http://sourceforge.net/projects/sevenzip/files/latest/download" - log.txt --trust-server-name

日志文件：

--2015-09-25 21:48:51--  
http://sourceforge.net/projects/sevenzip/files/latest/download
Resolving sourceforge.net (sourceforge.net)... 216.34.181.60
Connecting to sourceforge.net (sourceforge.net)|216.34.181.60|:80... connected.
HTTP request sent, awaiting response... 302 Found
Location: http://downloads.sourceforge.net/project/sevenzip/7-Zip/15.07/7z1507-extra.7z?r=&ts=1443210538&use_mirror=skylink [following]
--2015-09-25 21:48:51--  http://downloads.sourceforge.net/project/sevenzip/7-Zip/15.07/7z1507-extra.7z?r=&ts=1443210538&use_mirror=skylink
Resolving downloads.sourceforge.net (downloads.sourceforge.net)... 216.34.181.59
Connecting to downloads.sourceforge.net (downloads.sourceforge.net)|216.34.181.59|:80... connected.
HTTP request sent, awaiting response... 302 Found
Location: http://skylink.dl.sourceforge.net/project/sevenzip/7-Zip/15.07/7z1507-extra.7z [following]
--2015-09-25 21:48:52--  http://skylink.dl.sourceforge.net/project/sevenzip/7-Zip/15.07/7z1507-extra.7z
Resolving skylink.dl.sourceforge.net (skylink.dl.sourceforge.net)... 109.230.212.53
Connecting to skylink.dl.sourceforge.net (skylink.dl.sourceforge.net)|109.230.212.53|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 849832 (830K) [application/x-7z-compressed]
Saving to: '7z1507-extra.7z'

     0K .......... .......... .......... .......... ..........  6%  848K 1s
    50K .......... .......... .......... .......... .......... 12% 1.31M 1s
   100K .......... .......... .......... .......... .......... 18% 2.10M 1s
   150K .......... .......... .......... .......... .......... 24% 1.53M 0s
   200K .......... .......... .......... .......... .......... 30% 4.76M 0s
   250K .......... .......... .......... .......... .......... 36% 2.10M 0s
   300K .......... .......... .......... .......... .......... 42% 5.13M 0s
   350K .......... .......... .......... .......... .......... 48% 4.73M 0s
   400K .......... .......... .......... .......... .......... 54% 4.02M 0s
   450K .......... .......... .......... .......... .......... 60% 3.77M 0s
   500K .......... .......... .......... .......... .......... 66% 3.73M 0s
   550K .......... .......... .......... .......... .......... 72% 3.69M 0s
   600K .......... .......... .......... .......... .......... 78% 3.76M 0s
   650K .......... .......... .......... .......... .......... 84% 3.27M 0s
   700K .......... .......... .......... .......... .......... 90% 4.05M 0s
   750K .......... .......... .......... .......... .......... 96% 3.85M 0s
   800K .......... .......... .........                       100% 3.88M=0.3s

2015-09-25 21:48:52 (2.56 MB/s) - '7z1507-extra.7z' saved [849832/849832]

查看我实际想要获取哪些文件：http://sourceforge.net/projects/sevenzip/files/7-Zip/15.07/

信息：我指定最新版本而不是例如 15.07，因为我总是想要最新版本。

需要更多信息，尽管问！

Answer 1

SourceForge returns 错误的 HTTP 重定向 url 当不是从浏览器访问时，这是他们的错，您可以在他们的支持论坛或其他地方提交错误报告。

但是仍然可以下载页面源代码，抓取正确的 url 并下载它：

@echo off
echo Retrieving correct download url...
for /f "delims=;? tokens=2" %%a in (
    'wget http://sourceforge.net/projects/sevenzip/files/latest/download ^
        -q -O - --user-agent="Mozilla/5.0 (Windows NT 6.0)" ^
    ^| find "meta http-equiv=""refresh"""'
) do (
    for /f "delims== tokens=1*" %%b in ("%%a") do (
        wget "%%c"
    )
)
pause

解释：

--user-agent="Mozilla/5.0 (Windows NT 6.0)" 是 sourceforge 站点识别的最小用户代理字符串，这使它为我们提供了一个 html 页面，正如我们在浏览器中看到的那样。
-q 停止进度报告，-O - 将下载的页面打印到标准输出管道
find 从该管道读取并输出具有正确重定向的行 url:

    <meta http-equiv="refresh" content="5; url=http://downloads.sourceforge.net/project/sevenzip/7-Zip/15.07/7z1507.exe?r=&amp;ts=1443257723&amp;use_mirror=netcologne">

for /f "delims=;? tokens=2" 解析上面的行，在 ; 和 ? 处拆分并提取第二个标记：url=http://downloads.sourceforge.net/project/sevenzip/7-Zip/15.07/7z1507.exe
for /f "delims== tokens=1*"，同样地，在 = 处拆分并用 *
最后使用正确的url下载文件

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